Many interesting features on Jupiter are visible in these images. On the left, you can see at least 4 of Jupiter's cloud bands (or belts). The dark lines are called belts, and the light regions are called zones. They are bands of clouds made of hydrogen, methane and other gases that swirl around Jupiter at speeds of up to 300 miles per hour. Also visible in the left image is the shadow of Jupiter's moon Io. This is caused by Io moving in front of Jupiter in relation to the sun. Io itself is not visible; it takes a longer exposure to bring it out. In the right image, Jupiter's Great Red Spot is faintly visible in the topmost wide belt. It doesn't appear red, however; it appears more tan colored in this image. There is also some detail visible in the lower wide belt. The bottom image is a CCD image taken with a ST-6 CCD camera.